[PATCH] uml: separate libc-dependent uaccess code

The serial UML OS-abstraction layer patch (um/kernel dir).

This moves all systemcalls from uaccess_user.c file under os-Linux dir

Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Cc: Paolo Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/um/kernel/uaccess.c b/arch/um/kernel/uaccess.c
new file mode 100644
index 000000000000..054e3de0784e
--- /dev/null
+++ b/arch/um/kernel/uaccess.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
+ * Copyright (C) 2001, 2002 Jeff Dike (jdike@karaya.com)
+ * Licensed under the GPL
+ */
+
+/* These are here rather than tt/uaccess.c because skas mode needs them in
+ * order to do SIGBUS recovery when a tmpfs mount runs out of room.
+ */
+
+#include <linux/string.h>
+#include "os.h"
+
+void __do_copy(void *to, const void *from, int n)
+{
+        memcpy(to, from, n);
+}
+
+
+int __do_copy_to_user(void *to, const void *from, int n,
+                      void **fault_addr, void **fault_catcher)
+{
+        unsigned long fault;
+        int faulted;
+
+        fault = __do_user_copy(to, from, n, fault_addr, fault_catcher,
+                               __do_copy, &faulted);
+        if(!faulted) return(0);
+        else return(n - (fault - (unsigned long) to));
+}